jitender Posted November 14, 2005 Report Share Posted November 14, 2005 Basically i want to knw the corresponding waveform of unipolar PAM.I wud be extremely greatful for u.Jitender Quote Link to comment Share on other sites More sharing options...
prateeksikka Posted November 14, 2005 Report Share Posted November 14, 2005 hi jitender!if i am not mistaken u are talking about pulse amplitute modulation.The amplitude of same ,symmetrical pulses is varied in accordance with modulating signal.just like AM .but it is pulses as carrier rather than a sinusoid. ;D Quote Link to comment Share on other sites More sharing options...
walid Posted December 4, 2005 Report Share Posted December 4, 2005 Read this pdf file I hope it will help u:www.comlab.hut.fi/opetus/245/2004/07_digibaseb.ppt Quote Link to comment Share on other sites More sharing options...
ante Posted December 4, 2005 Report Share Posted December 4, 2005 Hi guys,This is not a PDF file it’s a PPT file, you need Microsoft Power Point to view this file! ;) Quote Link to comment Share on other sites More sharing options...
audioguru Posted December 4, 2005 Report Share Posted December 4, 2005 I worked with a huge intercom system that multiplexed many conversations and background music internally along a single wire using PAM. The instantaneous amplitude of each conversation was sampled in its time-slot then a sample-and-hold stage held it until the multiplexer came around again to its time slot for the next sample. Of course, the multiplexer operated at a very high frequency. After being decoded in its time slot and filtering, it sounded nearly perfect.I had to soup-it-up so it met the strict "broadcast quality" spec's for the PA at international airports. Nearly CD quality sound. ;D Quote Link to comment Share on other sites More sharing options...
prateeksikka Posted December 6, 2005 Report Share Posted December 6, 2005 hi audioguru!i guess we hardly use PAM for digital modulation i guess PTM has more advantages.and know one thing,i just came to know that there is a fallacy in the name itself of PCM(it is not a modulation scheme)!cheers! Quote Link to comment Share on other sites More sharing options...
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